May in Vigo averages a daily high of 20°C with nights around 10.8°C. Expect roughly 12.4 wet days totalling 107.3mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Vigo is June–September.
Based on VIGO PEINADOR, SP (8.2km), 1995–2024. 30 years of May data.